How do you call a simingly quite difficult task (not necessarily mental or physical one) which requires lots of efforts and looks too difficult "at the beginning"?
The term / expression / idiom which I'm looking for often is sarcastically said to someone who finds a task unpreformable and far away from their capabilities and the realm of their abilities which is normally used in order to undermine their belief about the situation!
The only founded expression based on my researches is daunting task! Please consider the following self-made example:
A) Hey dude! What's up?
B) Nothing! Just I'm fed up with all these unnecesaary math subjects! Tomorrow, I'll have an exame and I've not even cracked the book open!
A) No worries bro! That's not a daunting task. You'll pass it.
Now, I need to know:
- First) If this sentence works here.
- Second) If works, then whether it seems to be natural and idiomatic here.
- Third) Whether there are some other alternatives in common use for this concept.